Waterball in the heart! - Image 11

Image in Interventional Cardiovascular Medicine: what is displayed on this image? ... and do not hesitate to comment how you would treat this case!

A 49-year-old woman presented with progressive dyspnea for six months. The transthoracic 2D-echocardiogram showed a pedunculated, cystic mass in the left atrium attached to the inter-atrial septum. It measured 3 X 3.3 cm and prolapsed partially through the mitral valve into the left ventricle during diastole causing severe obstruction in transmitral inflow with a mean gradient of 22 mmHg. Due to interatrial septum attachment, possibility of atrial myxoma was considered, but it is unlikely for myxoma to be cystic...

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